Ribbed boot



FIG. 1 is a rear perspective view of a ribbed boot showing my new design;

FIG. 2 is a side elevation view of FIG. 1;

FIG. 3 is a front elevation view of FIG. 1; and,

FIG. 4 is a rear elevation view of FIG. 1. 

The ornamental design of a ribbed boot, as shown and described. 